<template>
  <div>
    <el-card class="swiper-container">
      <template #header>
        <div class="header">
          <el-button type="primary" size="small" icon="el-icon-plus" @click="handleAdd">增加</el-button>
          <el-popconfirm title="确定删除吗？" @confirm="handleDelete">
            <template #reference>
              <el-button type="danger" size="small" icon="el-icon-delete">批量删除</el-button>
            </template>
          </el-popconfirm>
        </div>
      </template>
      <el-table
        v-loading="loading"
        ref="multipleTable"
        :data="tableData"
        tooltip-effect="dark"
        style="width: 100%"
        @selection-change="handleSelectionChange"
      >
        <el-table-column type="selection" width="55"></el-table-column>
        <el-table-column label="轮播图" width="200">
          <template #default="scope">
            <img style="width: 150px;height: 150px" :src="scope.row.carouselUrl" alt="轮播图" />
          </template>
        </el-table-column>
        <el-table-column label="跳转链接">
          <template #default="scope">
            <a target="_blank" :href="scope.row.redirectUrl">{{ scope.row.redirectUrl }}</a>
          </template>
        </el-table-column>
        <el-table-column prop="carouselRank" label="排序值" width="120"></el-table-column>
        <el-table-column prop="createTime" label="添加时间" width="200"></el-table-column>
        <el-table-column label="操作" width="100">
          <template #default="scope">
            <a
              style="cursor: pointer; margin-right: 10px"
              @click="handleEdit(scope.row.carouselId)"
            >修改</a>
            <el-popconfirm title="确定删除吗？" @confirm="handleDeleteOne(scope.row.carouselId)">
              <template #reference>
                <a style="cursor: pointer">删除</a>
              </template>
            </el-popconfirm>
          </template>
        </el-table-column>
      </el-table>
      <!--总数超过一页，再展示分页器-->
      <el-pagination
        background
        layout="prev, pager, next"
        :total="total"
        :page-size="pageSize"
        :current-page="currentPage"
        @current-change="changePage"
      />
    </el-card>
    <DialogAddSwiper ref="addGood" :reload="getCarousels" :type="type" />
  </div>
</template>

<script>
import { onMounted, reactive, ref, toRefs } from "vue";
import { ElMessage } from "element-plus";
import DialogAddSwiper from "@/components/DialogAddSwiper.vue";
import axios from "@/utils/axios";
export default {
  name: "Swiper",
  components: {
    DialogAddSwiper
  },
  setup() {
    const multipleTable = ref(null);
    const addGood = ref(null);
    const state = reactive({
      loading: false,
      tableData: [], // 数据列表
      multipleSelection: [], // 选中项
      total: 0, // 总条数
      currentPage: 1, // 当前页
      pageSize: 10, // 分页大小
      type: "add" // 操作类型
    });
    onMounted(() => {
      getCarousels();
    });
    // 获取轮播图列表
    const getCarousels = () => {
      state.loading = true;
      axios
        .get("/carousels", {
          params: {
            pageNumber: state.currentPage,
            pageSize: state.pageSize
          }
        })
        .then(res => {
          state.tableData = res.list;
          state.total = res.totalCount;
          state.currentPage = res.currPage;
          state.loading = false;
        });
    };
    // 添加轮播项
    const handleAdd = () => {
      state.type = "add";
      addGood.value.open();
    };
    // 修改轮播图
    const handleEdit = id => {
      state.type = "edit";
      addGood.value.open(id);
    };
    // 选择项
    const handleSelectionChange = val => {
      state.multipleSelection = val;
    };
    // 批量删除
    const handleDelete = () => {
      if (!state.multipleSelection.length) {
        ElMessage.error("请选择项");
        return;
      }
      axios
        .delete("/carousels", {
          data: {
            ids: state.multipleSelection.map(i => i.carouselId)
          }
        })
        .then(() => {
          ElMessage.success("删除成功");
          getCarousels();
        });
    };
    // 单个删除
    const handleDeleteOne = id => {
      axios
        .delete("/carousels", {
          data: {
            ids: [id]
          }
        })
        .then(() => {
          ElMessage.success("删除成功");
          getCarousels();
        });
    };
    const changePage = val => {
      state.currentPage = val;
      getCarousels();
    };
    return {
      ...toRefs(state),
      multipleTable,
      handleSelectionChange,
      addGood,
      handleAdd,
      handleEdit,
      handleDelete,
      handleDeleteOne,
      getCarousels,
      changePage
    };
  }
};
</script>

<style scoped>
.swiper-container {
  min-height: 100%;
}
.el-card.is-always-shadow {
  min-height: 100% !important;
}
</style>